Messages in this thread | | | Date | Thu, 6 Nov 2014 21:39:04 +0900 | From | Norbert Preining <> | Subject | Re: khugepaged / firefox going wild in 3.18-rc |
| |
Hi Vlastimil
thanks for your answer.
In the meantime I have tried rc3, too, with the same effects.
Interestingly, once it goes into a bad state, every future approach does the same. I started shotwell (photo organizer) and it went into the same state (khugepaged / shotwell each using about 100% of CPu time).
On Thu, 06 Nov 2014, Vlastimil Babka wrote: > Could be that another task holds the mmap_sem during THP allocation attempt on > its own page fault, and compaction goes in some kind of infinite loop. There are
My feeling somehow is about the plugin-container in firefox ... (flashplayer or something similar, but I might be wrong!). With shotwell, I have no idea why.
> I suggested testing a commit revert in one thread, and a possible fix in the > other. If you can reproduce this well, that would be very useful.
Which commit are you talking about? I can easily revert some/all of what you want and do test runs.
> khugepaged using CPU also points to either the address space scanning, or > compaction going wrong. Since 8b1645685ac it shouldn't hold mmap_sem during > compaction, but that still leaves page faulters to possibly hold it.
So, do you mean I should try reverting 8b1645685ac?
> So yeah we would need the stacks of processes that do hog the CPU's, not those > that sleep. As David suggested, a /proc/pid/stack could work. Also can you > please provide /proc/zoneinfo ?
Again, as I mentioned, I don't have /proc/pid/stack for any "pid", is this depending on some specific kerenl option?
/proc/zoneinfo I have and can send you the next time.
Thanks a lot and all the best
Norbert
------------------------------------------------------------------------ PREINING, Norbert http://www.preining.info JAIST, Japan TeX Live & Debian Developer GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13 ------------------------------------------------------------------------
| |